washingtonpost.com – Most families are elated after the birth of a new baby. But for Francine and David Wheeler, who welcomed Matthew Bennett Wheeler last week, their baby boy’s birth was filled with a depth of emotions. That’s because two years ago their 6-year-old Benjamin Wheeler, who loved lighthouses and chocolate chip pancakes, was killed in the mass shooting at Sandy Hook Elementary School in Newtown, Conn. They told CBS News that their new baby “was bringing light and joy into their lives.